Continuously fired batch-type incineration

ABSTRACT

A &#39;&#39;&#39;&#39;batch&#39;&#39;&#39;&#39;-type incinerator that may be continuously loaded and fired to effect continuous incineration of waste material. The incinerator defined therefore has the advantages of both the &#39;&#39;&#39;&#39;batch&#39;&#39;&#39;&#39; and &#39;&#39;&#39;&#39;continuously&#39;&#39;&#39;&#39; loaded incinerators without the inherent disadvantages of either type.

Maite@ Slm-tes Patent [72] lnventors Richard F. Stockman Friendship;William M. Anderson, Wellsvllle, both of N.Y. [2l] Appl. No. 40,293 [22]Filed May 22, 1970 [45] Patented Dec. 14, 1971 [73] Assignee The AirPreheeter Company, lne.

Wellsville, N.Y.

[54] CONTINUOUSLY FIRED BATCH-TYPE INCENERATION 2 Claims, 2 DrawingFigs.

[52] ELS. Cl. 110/8 R, 110/8 A, ll0/l8 R [5l] int. Cl. F233 5/00 A l lla O 2? 22 [50] Field ofSearch llO/7, 8, l5, i8

[56] References Cited UNITED STATES PATENTS 661,463 ll/l900 Wilkie 110/81,603,589 l0/l926 Felton, Jr. l 10/8 1,974,250 9/1934 Osborn l l0/15Primary Examiner-Kenneth W. Sprague Attorneys-Wayne H. Lang and Eldon H.Luther ABSTRACT: A batchtype incinerator that may be continuously loadedand red to effect continuous incineration of waste material. Theincinerator defined therefore has the advantages of both the batch andcontinuously" loaded incinerators without the inherent disadvantages ofeither type.

CONTINUOUSLY F IRED BATCH-TYPE INCINERATION BACKGROUND OF THE INVENTIONl. Field of the Invention This invention relates to an improvedbatch"type incinerator where the incinerator is charged with a givenamount of refuse or waste to be burned, ignited, and then burned o'completely before the incinerator is opened to the atmosphere, a newcharge place therein, and the process repeated.

2. Description of the Prior Art Batchtype incinerators of the prior artwere simple to use, their original cost and the cost of operation wererelatively low, and they did not require the continuous attendance of anoperator. Therefore they were at first quite desirable from anoperational standpoint. However, in addition to these desirablecharacteristics of a typical batchtype incinerator were the undesirablecharacteristics that such units had a relatively small capacity and theyrequired complete cooling between the firing of separate batches."Accordingly they were slow in operation and thus suitable only for smalloperations. Moreover, if the incinerator was opened for feeding and airallowed to freely enter the incinerator through an open feeding door,the cycle of operation would be broken and improper combustion wouldresult in excess smoke and poor l eliminations.

A natural step in the development of an effective incinerator was thedevelopment of a continuous feed"type incinerator which had a greatercapacity together with effective incineration. However this type ofcontinuous feed too encountered other problems, not the least of whichwas economic in that a skilled operator was required to be in constantattendance to insure satisfactory operation.

SUMMARY OF THE INVENTION The present invention is therefore directed toa "batch"- type incinerator that may be operated continuously. It isreadily adapted for loads of various characteristics and it will operateproperly and effectively without the continuous presence of a skilledoperator. DESCRIPTION OF THE DRAWING A more complete understanding ofour invention may be realized by referring to the following descriptionin conjunction with the accompanying drawings in which:

FIG. l is a schematic side elevation showing an incinerator arrangementhaving multiple loading chambers and a single exhaust stack.

FIG. 2 is an example of an alternate arrangement utilizing multipleloading chambers and a single exhaust stack.

IN THE SPECIFICATION ln the drawings the incinerator comprises a housinghaving a closed combustion chamber 12 with a loading port at one endthrough which waste may be loaded and an outlet port 16 through whichgases generated therein may flow on their exhaust to the atmostphere.

The combustion chamber 12 generally comprises an outer jacket I8 ofsteel with an inner coating 22 of insulating material capable ofstanding up at temperatures of 2500 F.

A charging door 24 is provided to tightly seal the loading openingwhereby it may be opened widely for ease of loading and then tightlyclosed to preclude the flow of air therethrough when incineration isunderway. The entire end 26 of the incinerator comprises a pivoted doorthat may be opened widely to permit repair of the housing or to providefor the removal of ashes resulting from the incineration process.

The outlet port 16 is connected to a branch of an inverted T"shapedoutlet duct 20 housing a secondary combustion chamber 36. A source offuel 44 and air 3l together with an independent ignition means 48 isprovided to initiate and sustain the combustion gases produced in eitherhousing by the combustion of waste therein under less thanstoichiometric conditions. An outlet stack 38 is secured to the uprightbranch of duct 20 to vent the exhaust gases into the atmosphere.

The source of air 46 is provided whereby air for combustion may besupplied via ducts 30 to apertured undertire tubes 32 and via duct 3l tothe secondary combustion chamber. The inverted T"shaped outlet duct 20enclosing the secondary combustion chamber 36 is secured to the housingat outlet 16 whereby all gases generated in the chambers l2 or 12A areforced to traverse the combustion chamber and then exhaust to theatmosphere through outlet stack 38.

Air for combustion of gas in chamber 36 is supplied thereto via duct 3l,while gas or other fuel is supplied via duct 44 and then ignited byignition means 48 so that a predetermined temperature is maintained atthermocouple 52 in the secondary combustion chamber and at thermocouple54 in the stack.

In accordance with this invention a second housing 10A enclosing achamber 12A is provided with an outlet port connected to the secondarycombustion chamber 36. The chamber 12A is provided with a loading port24A and a cleanout door 26A similar to that provided for chamber l2 at24 and 26. An apertured air inlet duct 32A provides underfire combustionair to chamber 12A from the same source 46 as that which suppliescombustion air to chamber I2. Valves 76 and 78 in the air supply linesmay be operated manually or by thermocouple 54 and 56 in the stack toprovide the combustion air necessary to support combustion of all gassesproduced in the primary combustion chambers 12 or 12A. Thermocouple 52in chamber 36 controls the valve 82 for air from source 46 insuringcontinuous combustion of exhaust gases in the secondary chamber.

FIG. 2 shows a slightly modified arrangement whereby the primarychambers 13 and 13A are arranged in a spaced parallel relationship topermit loading said chambers alternately in accordance with theteachings of this invention.

Various other arrangements involving the use of multiple combustionchambers may be utilized without departing from the spirit of theinvention. Thus the foregoing descriptive matter and drawings are to beinterpreted as illustrative of the invention rather than as limiting thescope of the appended claims.

We claim:

l. Apparatus for the incineration of waste material comprising anincinerator housing enclosing a chamber with a loading port for thecharging of waste material therein and an outlet port exhausting theproducts of combustion therefrom, an airtight closure door for theloading port, a branched outlet duct enclosing a secondary combustionchamber, means connect ing one branch of said duct to the outlet port ofthe incinerator chamber, a burner in said secondary combustion chamberincluding a source of fuel and air, an outlet stack, means connectingthe outlet stack to a branch of said outlet duct, a second incineratorhousing having loading and outlet ports, means connecting the outletport of the second incinerator housing to a branch of said outlet duct,temperature responsive means in the outlet stack, and means igniting theburner in the secondary combustion chamber when the temperature in theoutlet stack falls below a predetennined minimum.

2. Apparatus for the destruction of combustible waste materialcomprising a first incinerator housing enclosing a chamber having aloading port for the charging of waste material therein and an outletport exhausting the products of combustion therefrom, an airtightclosure door for the loading port, a T"shaped outlet duct enclosing asecondary combustion chamber, means connecting a branch of said duct tothe outlet port of the first chamber, an outlet stack, means connectingthe outlet stack to an essentially vertical branch of said outlet duct,a second incinerator housing having inlet and outlet ports, air supplymeans connected to the first and second incinerator housings, a singlesource of air connected to said air supply means, valve meanscontrolling the flow of air through said air supply means to the firstand second incinerator housings, temperature responsive means in the outlet stack controlling said valve means, and means connecting the outletport of the second incinerator to an independent branch of said outletduct whereby the rst and second incinerators are simultaneouslyconnected to the secondary combustion chamber of the outlet duct.

1. Apparatus for the incineration of waste material comprising anincinerator housing enclosing a chamber with a loading port for thecharging of waste material therein and an outlet port exhausting theproducts of combustion therefrom, an airtight closure door for theloading port, a branched outlet duct enclosing a secondary combustionchamber, means connecting one branch of said duct to the outlet port ofthe incinerator chamber, a burner in said secondary combustion chamberincluding a source of fuel and air, an outlet stack, means connectingthe outlet stack to a branch of said outlet duct, a second incineratorhousing having loading and outlet ports, means connecting the outletport of the second incinerator housing to a branch of said outlet duct,temperature responsive means in the outlet stack, and means igniting theburner in the secondary combustion chamber when the temperature in theoutlet stack falls below a predetermined minimum.
 2. Apparatus for thedestruction of combustible waste material comprising a first incineratorhousing enclosing a chamber having a Loading port for the charging ofwaste material therein and an outlet port exhausting the products ofcombustion therefrom, an airtight closure door for the loading port, a''''T''''-shaped outlet duct enclosing a secondary combustion chamber,means connecting a branch of said duct to the outlet port of the firstchamber, an outlet stack, means connecting the outlet stack to anessentially vertical branch of said outlet duct, a second incineratorhousing having inlet and outlet ports, air supply means connected to thefirst and second incinerator housings, a single source of air connectedto said air supply means, valve means controlling the flow of airthrough said air supply means to the first and second incineratorhousings, temperature responsive means in the outlet stack controllingsaid valve means, and means connecting the outlet port of the secondincinerator to an independent branch of said outlet duct whereby thefirst and second incinerators are simultaneously connected to thesecondary combustion chamber of the outlet duct.